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Little Dot MK 9 Tube Headphone Amplifier

Posted: Sep 12th, '13, 20:43
by sword_yang
The Little Dot MK 9 is a vacuum-tube based headphone amplifier and stereo pre-amplifier. It uses three tubes (front stage: 6N9P, post stage: 2x 6080) in a versatile SEPP (single ended push pull) OCL (output capacitor-less) in Class-A design that can power headphones of all impedance with unmatched purity of sound.

The output of this dynamic cathode output circuit provides high dynamic range without a hint of distortion (30Vp-p). Due to the lack of an output capacitor in the signal path, the warmth and tonal richness of tubes can shine though with absolute purity.

The Little Dot MK 9 can also be used as a pre-amp with all power amps as it incorporates a "zero servo" tracking circuit to ensure the the DC level is 0. There is also a relay protection circuit to protect your valuable headphones.

Leveraging the RCA 6080 tubes, the Little Dot MK 9 produces high large current output to power even very low impedance headphones to their full potential!




Technical Specifications
  • SEPP (Single-ended Push Pull) OCL (Output CapacitorLess) in Class-A
  • Front Tube: 6N9P
  • Rear Tubes: 2x RCA 6080 (Bias Voltage:22V Bias Current:65mA)
  • Inputs:
  • Single-ended: 2x RCA
  • Outputs:
  • Pre-Amp: 2x RCA
  • Single-ended: 1/4" (6.35mm) TRS Stereo jack
  • Frequency Response:
  • 12Hz - 100KHz (-1dB)
  • Input Impedance: 50K ohms
  • Pre-Amplifier Output Impedance: 600 ohms
  • THD+N:
  • 0.05 % (300 ohm, 80 mW)
  • Power Output:
    • 300 mW per channel into 300/600 ohms
    • 350 mW per channel into 120 ohms
    • 250 mW per channel into 32 ohms
  • Power Consumption: 80 VA
  • Measurements:
  • Metric: 300mm (length) by 220mm (width) by 150mm (height)
  • Imperial: 11.8 inches (length) by 8.7 inches (width) by 5.9 inches (height)
  • Weight: 4 kg or 8.81 lbs
  • Available in either 110-120VAC or 220-240VAC
  • One Year Official Little Dot Warranty (lifetime labor/parts coverage)